Power Systems Engineering

noun A device that is used to change the direction of current in an electric motor.

• The commutator in the electric motor helps to reverse the direction of current flow.
• Make sure to check the commutator in the motor for any signs of wear and tear.
• I heard that the commutator in that old car is shot, causing it to have trouble starting.
• In life, the commutator represents the ability to change course and reverse decisions when necessary.

noun a measure of this ability, expressed as the amount of electric charge that can be stored per unit voltage

• The capacitance of the circuit can be calculated using the formula C = Q/V.
• I'm not sure how to measure capacitance in this circuit.
• Dude, the capacitance of this thing is off the charts!
• Her capacitance for learning new skills is truly impressive.